DAQ1200 User Guide: Difference between revisions
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<metadesc>Add 4 digital inputs to your VINT Hub with the 4x Digital Input Phidget. These inputs react faster than a VINT port in Digital Input mode.</metadesc> | |||
[[Category:UserGuide]] | [[Category:UserGuide]] | ||
== | == Part 1: Setup == | ||
{{ | {{PT1 Deck Sequence}} | ||
== Part 2: Using Your Phidget == | |||
===About=== | |||
Read four digital output devices with the DAQ1200. This Phidget is best suited for reading switches, or 5V logic level devices. | |||
[[Image:DAQ1200_About.jpg|link=|center]] | |||
The DAQ1200 is an active-low device. You interact with the DAQ1200 through the Digital Input Channel Class. The Digital Input state equals ''true'' when grounded and ''false'' when connected to a high voltage. | |||
===Explore Your Phidget Channels Using The Control Panel=== | |||
You can use your Control Panel to explore your Phidget's channels. | |||
'''1.''' Open your Control Panel, and you will find the following channels: | |||
= | [[Image:DAQ1200_Panel.jpg|link=|center]] | ||
==== | '''2.''' Double click on a channel to open an example program. Each channel belongs to the '''Digital Input''' channel class: | ||
{{UGC-Start}} | |||
{{UGC-Entry|Digital Input:| Read the state of a 5V digital signal| | |||
In your Control Panel, double click on "Digital Input": | |||
[[Image:DAQ1200-test-DigitalInput.jpg|center|link=]]}} | |||
For more information about Digital Inputs, take a look at the [[Digital Input Guide]]. | |||
{{UGC-End}} | |||
{{UG-Part3}} | |||
== Part 4: Advanced Topics and Troubleshooting == | |||
{{UGC-Start}} | |||
{{UGC-Addressing}} | |||
{{UGC-Graphing}} | |||
{{UGC-Firmware}} | |||
{{UGC-Entry|Using the DAQ1200 with a Switch|| | |||
[[Image:DAQ1200_SwitchInput.jpg|link=|350px|right]] | [[Image:DAQ1200_SwitchInput.jpg|link=|350px|right]] | ||
To interface a switch with the DAQ1200, simply connect the switch across the input and ground terminals for a channel. | To interface a switch with the DAQ1200, simply connect the switch across the input and ground terminals for a channel. | ||
}} | |||
{{UGC-Entry|Using the DAQ1200 with 5V Logic Level Devices|| | |||
[[Image:DAQ1200_LogicInput.jpg|link=|350px|right]] | [[Image:DAQ1200_LogicInput.jpg|link=|350px|right]] | ||
The DAQ1200 can also detect signals from 5V logic level devices. Be aware that the input is active-low, which means that LOW voltages will be detected as TRUE, and HIGH voltages as FALSE. | The DAQ1200 can also detect signals from 5V logic level devices. Be aware that the input is active-low, which means that LOW voltages will be detected as TRUE, and HIGH voltages as FALSE. | ||
}} | |||
{{UGC-Entry|Isolation with Optocouplers|| | |||
[[Image:DAQ1200_Optocoupler_Diagram.jpg|link=|350px|right]] | |||
In some applications, particularly where there is a lot of electrical noise (automotive), or where you want maximum protection of the circuitry (interactive installations, kiosks), electrical isolation buys you a huge margin of protection. | |||
If wired according to the diagram, driving the LED will cause the DAQ1200 to report TRUE. | |||
{{ | Note that in cases where many isolated inputs are required, or for simplicity's sake, you may want to consider using the {{Prod|DAQ1300}} or {{Prod|DAQ1301}}, which are (more sophisticated) ready-made isolated digital input Phidgets. | ||
}} | |||
{{UGC-End}} |
Latest revision as of 19:38, 1 June 2023
Part 1: Setup
Part 2: Using Your Phidget
About
Read four digital output devices with the DAQ1200. This Phidget is best suited for reading switches, or 5V logic level devices.

The DAQ1200 is an active-low device. You interact with the DAQ1200 through the Digital Input Channel Class. The Digital Input state equals true when grounded and false when connected to a high voltage.
Explore Your Phidget Channels Using The Control Panel
You can use your Control Panel to explore your Phidget's channels.
1. Open your Control Panel, and you will find the following channels:

2. Double click on a channel to open an example program. Each channel belongs to the Digital Input channel class:
In your Control Panel, double click on "Digital Input":

For more information about Digital Inputs, take a look at the Digital Input Guide.
Part 3: Create your Program
Part 4: Advanced Topics and Troubleshooting
Before you open a Phidget channel in your program, you can set these properties to specify which channel to open. You can find this information through the Control Panel.
1. Open the Control Panel and double-click on the red map pin icon:

2. The Addressing Information window will open. Here you will find all the information you need to address your Phidget in your program.

See the Phidget22 API for your language to determine exact syntax for each property.
Note: Graphing and logging is currently only supported in the Windows version of the Phidget Control Panel.
In the Phidget Control Panel, open the channel for your device and click on the icon next to the data type that you want to plot. This will open up a new window:
If you need more complex functionality such as logging multiple sensors to the same sheet or performing calculations on the data, you'll need to write your own program. Generally this will involve addressing the correct channel, opening it, and then creating an Event Handler and adding graphing/logging code to it.
The quickest way to get started is to download some sample code for your desired programming language and then search google for logging or plotting in that language (e.g. "how to log to csv in python") and add the code to the existing change handler.
Filtering
You can perform filtering on the raw data in order to reduce noise in your graph. For more information, see the Control Panel Graphing page.
Graph Type
You can perform a transform on the incoming data to get different graph types that may provide insights into your sensor data. For more information on how to use these graph types, see the Control Panel Graphing page.
Firmware Upgrade
MacOS users can upgrade device firmware by double-clicking the device row in the Phidget Control Panel.
Linux users can upgrade via the phidget22admin tool (see included readme for instructions).
Windows users can upgrade the firmware for this device using the Phidget Control Panel as shown below.
Firmware Downgrade
Firmware upgrades include important bug fixes and performance improvements, but there are some situations where you may want to revert to an old version of the firmware (for instance, when an application you're using is compiled using an older version of phidget22 that doesn't recognize the new firmware).
MacOS and Linux users can downgrade using the phidget22admin tool in the terminal (see included readme for instructions).
Windows users can downgrade directly from the Phidget Control Panel if they have driver version 1.9.20220112 or newer:
Firmware Version Numbering Schema
Phidgets device firmware is represented by a 3-digit number. For firmware patch notes, see the device history section on the Specifications tab on your device's product page.
- If the digit in the 'ones' spot changes, it means there have been bug fixes or optimizations. Sometimes these changes can drastically improve the performance of the device, so you should still upgrade whenever possible. These upgrades are backwards compatible, meaning you can still use this Phidget on a computer that has Phidget22 drivers from before this firmware upgrade was released.
- If the digit in the 'tens' spot changes, it means some features were added (e.g. new API commands or events). These upgrades are also backwards compatible, in the sense that computers running old Phidget22 drivers will still be able to use the device, but they will not be able to use any of the new features this version added.
- If the digit in the 'hundreds' spot changes, it means a major change has occurred (e.g. a complete rewrite of the firmware or moving to a new architecture). These changes are not backwards compatible, so if you try to use the upgraded board on a computer with old Phidget22 drivers, it will show up as unsupported in the Control Panel and any applications build using the old libraries won't recognize it either. Sometimes, when a Phidget has a new hardware revision (e.g. 1018_2 -> 1018_3), the firmware version's hundreds digit will change because entirely new firmware was needed (usually because a change in the processor). In this case, older hardware revisions won't be able to be upgraded to the higher version number and instead continue to get bug fixes within the same major revision.

To interface a switch with the DAQ1200, simply connect the switch across the input and ground terminals for a channel.

The DAQ1200 can also detect signals from 5V logic level devices. Be aware that the input is active-low, which means that LOW voltages will be detected as TRUE, and HIGH voltages as FALSE.

In some applications, particularly where there is a lot of electrical noise (automotive), or where you want maximum protection of the circuitry (interactive installations, kiosks), electrical isolation buys you a huge margin of protection.
If wired according to the diagram, driving the LED will cause the DAQ1200 to report TRUE.
Note that in cases where many isolated inputs are required, or for simplicity's sake, you may want to consider using the DAQ1300 or DAQ1301, which are (more sophisticated) ready-made isolated digital input Phidgets.